CN109209541A - Variable valve actuator for air - Google Patents
Variable valve actuator for air Download PDFInfo
- Publication number
- CN109209541A CN109209541A CN201810667602.0A CN201810667602A CN109209541A CN 109209541 A CN109209541 A CN 109209541A CN 201810667602 A CN201810667602 A CN 201810667602A CN 109209541 A CN109209541 A CN 109209541A
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- CN
- China
- Prior art keywords
- driver
- cam
- air
- variable valve
- valve actuator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
- F01L13/0042—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams being profiled in axial and radial direction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
- F01L2013/0052—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams provided on an axially slidable sleeve
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The variable valve actuator for air (10) that the present invention relates to a kind of for internal combustion engine, the variable valve actuator for air include camshaft (12), ventilation door (18,20) and cam bearer (22).Cam bearer (22) can be arranged in non-rotatably and axially on camshaft (12), and have the first cam (28) and the second cam (30).Variable valve actuator for air (10) includes force transfering device (16), force transfering device has force transmission element (40), force transmission element is selectively formed between the first cam (28) and ventilation door (18,20) or between the second cam (30) and ventilation door (18,20) according to the axial position of cam bearer (22) and is effectively connected, force transmission element finger device or rocker arm in particular.Variable valve actuator for air (10) includes the first driver (24), first driver is used for the axial displacement of cam bearer (22), wherein, the first driver (24) is at least partially accommodated into force transfering device (16).
Description
Technical field
The variable valve actuator for air (Variabler Ventiltrieb) that the present invention relates to a kind of for internal combustion engine.
Background technique
Valve, which controls internal combustion engine, has one or more controllable inlet valves or exhaust valve for each cylinder.Changeable air valve
Mechanism can flexibly control valve, to change opening time, shut-in time and/or valve stroke (Ventilhubs).With this side
Formula, power operation can for example adapt to specific load state.For example, variable valve actuator for air can pass through so-called sliding
Camming is realized.
19611641 C1 of DE discloses the example of this sliding cam system, can be with more by the sliding cam system
A different stroke curve drives ventilation door.For this purpose, having at least one includes the sliding of the cam part of multiple cam rails
Cam non-rotatably but can be axially mounted on camshaft；In the lift profile (Hubkontur) of the sliding cam
In, driver radially is introduced from outside in the form of pin, to generate the axial displacement of sliding cam.In each ventilation door,
Different valve strokes is set by the axial displacement of sliding cam.By make to accommodate and be mounted in camshaft by spring
The locking ball bond of load at least one lock slots, lock after equally axially moving relative to camshaft by sliding cam
It is scheduled on its relative axial position on camshaft.
Sliding cam system can occupy sizable space.In the case where steric requirements is restricted, for making cam
The arrangement of the driver of support (sliding cam) offset especially will form challenge.In general, driver is fixed on and cylinder head or gas
On the frame of cylinder head cover connection.
102011050484 A1 of DE discloses a kind of internal combustion engine with multiple cylinders, cylinder head and valve mechanism cover.For
Driving ventilation door, is provided at least one camshaft being rotatably mounted, these camshafts have at least one can be
The sliding cam being axially displaced on respective cams axis.Each sliding cam has at least one guiding piece part, the guiding piece
Part has at least one slot.Driver is provided in order to generate the axial displacement of each sliding cam.Driver is mounted on
In cylinder head or valve mechanism cover.
Summary of the invention
The purpose of the present invention is to provide it is a kind of with the improved of sliding cam system or substitution variable valve actuator for air,
The mechanism has the construction of installation space optimization.
By realizing this purpose according to the variable valve actuator for air of independent claims.In dependent claims and specification
In illustrate advantageous further construction.
Variable valve actuator for air for internal combustion engine has camshaft, ventilation door and cam bearer (sliding cam).Cam branch
Seat non-rotatably but can be axially arranged on camshaft, and have first cam and the second cam.Changeable air valve machine
Structure has force transmission element, and particularly, force transmission element is finger-like follower or rocker arm, and force transmission element is according to cam bearer
Axial position the first cam and ventilation door between or the second cam and ventilation door between formed effectively connection.Variable gas
Door machine structure has the first driver of the axial displacement for cam bearer, wherein the first driver is at least partially accommodated into
In force transfering device.
Since the first drive containment is in the force transfering device existing for script, so the first driver needs lesser peace
Dress space does not need additional installation space.Furthermore it is possible to which setting is for driving the first driver in force transfering device
Control device.
Particularly, first cam and the second cam may be disposed to adjacent to each other and/or with different cam contours.
For example, the different cam contours of first cam and the second cam can be used for reducing energy consumption, for heat management or use
In realization engine braking.
Preferably, cam bearer and the first driver can form sliding cam system.
In the especially preferred embodiments, force transfering device has bar axis, and particularly, bar axis is rocker arm shaft or finger
Device axis.First driver is at least partially accommodated into bar axis.
Particularly, rocker arm shaft can be used for being pivotally mounted on force transmission element.
In a further exemplary embodiment, force transfering device has bar bearing housing, and the first driver is at least partly
Ground is contained in bar bearing housing.
Preferably, bar bearing housing can be used for installing the bar axis of force transfering device, and bar axis is for being pivotably mounted power biography
Pass element.
In a further exemplary embodiment, the first driver is at least partially accommodated into transmitting element.
In variation, the first driver electromagnetically, pneumatically and/or is hydraulically driven.Alternatively or additionally, it uses
It is at least partially accommodated into the control system (for example, electrical, pneumatic and/or hydraulic control system) of the first driver of driving
In force transfering device (for example, force transmission element, bar axis and/or bar bearing housing).
In further construction, the first driver has telescopic pin, and pin can be with indulging preferably about camshaft
The the first engagement rail engagement spirally extended to axis, with the axial displacement for camshaft.In the engagement with engagement rail
When, the pin fixed relative to the axial direction of camshaft can be such that cam bearer is axially displaced.
Preferably, pin can be stretched out and be bounced back on the direction of the longitudinal axis relative to camshaft radially.
In another variation, the first driver has preferably hydraulic lifting device, and lifting device has the first cylinder
With the control piston being movably disposed in the first cylinder.Control piston effectively connect with pin or integrates landform with pin
At.Pin can be stretched out by control piston as a result,.
In one embodiment, lifting device is movably disposed in the second cylinder of the first driver.It is promoted as a result,
Device can be moved particularly on the direction backwards to cam bearer, so that the pin of driver and engagement rail are detached from.
In a preferred embodiment, it is disposed with release inclined-plane in an end of the first engagement rail, and is left in pin
When track, release inclined-plane makes lifting device mobile from first position to the second position on the direction backwards to cam bearer.
In another embodiment, the first elastic element is towards the pre-tensioner lifting device in first position, particularly, the first elasticity
Element is spring.Lifting device is mobile from first position to the second position against the pre-tensioning of the first elastic element as a result,.
In addition, in another embodiment, the first driver has control fluid service duct, at first of lifting device
Place is set, control fluid service duct is fluidly connected to the control fluid chamber of lifting device.Alternatively, or additionally, first
Driver has control fluid passing away, in the second place of lifting device, controls fluid passing away and fluidly connects
Pass to the control fluid chamber of lifting device.The supply of control fluid is able to carry out according to the position of lifting device (orientation) as a result,
And discharge.
In another variation, the first driver has the second elastic element, and the second elastic element is backwards to cam bearer
Direction on pre-tensioner control piston, particularly, the second elastic element is spring.
In preferred variant, variable valve actuator for air further includes the second driver of the axial displacement for cam bearer.
Second driver is at least partially accommodated into force transfering device, is particularly at least partially accommodated into the axis of force transfering device
In the force transmission element of bar, the bar bearing housing of force transfering device and/or force transfering device.As a result, such as the first driver, lead to
Cross the advantages of the second driver can be realized installation space aspect.
Particularly, the second driver can be designed to be equal with the first driver.
Preferably, the first driver and the second driver are formed independently of each other.However, the first driver and the second driving
Device can also form the integrated driving device in common housing.
Preferably, the first driver can make cam bearer mobile from the first axial position to second axial position, and
Second driver can make cam bearer mobile from second axial position to the first axial position.
In another embodiment, variable valve actuator for air has the control stream for the first driver and/or the second driver
Body feeding mechanism.Fluid supply apparatus is controlled with the bearing block for being rotatably mounted camshaft.Bearing block has first
Control fluid service duct and the second control fluid service duct being arranged at the downstream of the first control fluid service duct.The
One control fluid service duct and the second control fluid service duct can be according to the rotation angle of camshaft selectively fluids
Property connection, particularly, fluid communication is realized by the channel of camshaft, it is preferable that the channel is interconnection.
Particularly, the first control fluid service duct can be arranged at the downstream in hyperbaric chamber.
Preferably, the second control fluid service duct can be arranged in the upstream end of control fluid chamber.
Moreover, it relates to a kind of motor vehicles with variable valve actuator for air disclosed herein, particularly, motor vehicle
Refer to commerial vehicle (for example, bus or truck).
According to another aspect of the present invention, the construction of the first driver and/or the second driver disclosed herein be with
Independently of its arrangement in force transfering device mode disclosed in.That is, the first driver and/or the second driver can not also
It is arranged in the inside of force transfering device.First driver and/or the second driver can be designed to mode disclosed herein.Root
According to this aspect, the application, which especially realizes, provides substitution and/or improved hydraulic driver for sliding cam system
Purpose.
Above-mentioned preferred embodiment and feature of the invention can be arbitrarily combined with each other.Hereinafter describe with reference to the accompanying drawings
Other details and advantage of the invention.
Detailed description of the invention
Fig. 1 is the perspective view of variable valve actuator for air.
Fig. 2 is the cross-sectional view of variable valve actuator for air.
Fig. 3 is the schematic cross sectional views of camshaft and bearing block.
Specific embodiment
Embodiment shown in the accompanying drawings at least partly corresponds to, so that similar or identical part attached drawing mark having the same
Note, and in order to avoid repeating, the description referring also to other embodiments or attached drawing is illustrated.
Fig. 1 shows variable valve actuator for air 10.Variable valve actuator for air 10 has camshaft 12, sliding cam system 14, power
The ventilation door 18 of transfer device 16, first and the second ventilation door 20.Ventilation door 18,20 can be inlet valve or air outlet valve.
Variable valve actuator for air 10 can be used for adjusting the valve controlling curve of the first and second ventilation doors 18,20.Changeable air valve
Mechanism 10 is related to internal combustion engine (not shown).Internal combustion engine can for example be included in the commercial vehicles such as bus or truck
In.
Camshaft 12 is arranged to overhead camshaft (OHC).Dual Over Head Camshaft (DOHC) can be set into camshaft 12
A part or single camshaft (SOHC).
Sliding cam system 14 has cam bearer 22, the first driver 24 and the second driver 26.
Cam bearer 22 can be arranged in non-rotatably and axially on camshaft 12.Cam bearer 22 has the
One cam 28, the second cam 30, the first engagement rail (switching and booting part (Schaltkulisse)) 32 and the second engagement rail
(switching and booting part) 34.
First cam 28 and the second cam 30 have different cam contours, with bent for generating different valve control
Line.Different cam contours for example can be used in reducing energy consumption, be used for heat management or for realizing engine braking.
First cam 28 and the second cam 30 are arranged with offsetting from each other along the longitudinal axis of camshaft 12.Specifically,
One cam 28 and the second cam 30 are disposed adjacently to one another in the central part of cam bearer 22.In another embodiment, may be used
The alternative arrangements of additional cam and/or cam are arranged.For example, valve rocker can be distributed for each ventilation door, for gas
At least two cams of door rocker arm difference distributor support.One cam bearer can also be supported for two adjacent cylinders
The cam of ventilation door.
First engagement rail 32 is arranged in the first end region of cam bearer 22.Second engagement rail 34 is arranged convex
In the opposite the second end region of wheeling support 22.As the recess portion (slot) of cam bearer 22, the first and second engagement rails 32,
34 longitudinal axis for surrounding camshaft 12 spirally extend.In another embodiment, at least one of engagement rail can not
It is arranged in the axial end region of cam bearer.For example, engagement rail is arranged between two cams of cam bearer.
In order to be displaced cam bearer 22 axially, radially movable 36,38 selectivity of pin (bolt) of driver 24,26
Ground engages (engaging) in engagement rail 32,34.Specifically, it is bonded on first to 36 property of can choose of pin of the first driver 24
In engagement rail 32, so that cam bearer 22 is mobile from the first axial position to second axial position.Pin 36 is relative to camshaft
12 longitudinal axis radially moves.In Fig. 1, cam bearer 22 is illustrated at the first axial position.Conversely, the second driving
It is bonded in the second engagement rail 34 to 38 property of can choose of pin of device 26.Then, cam bearer 22 from second axial position to
The first axial position is mobile.
When the pin 36,38 of the stretching of each driver 24,26 is fixed relative to the axial direction of camshaft 12, cause convex
The axial displacement of wheeling support 22.Therefore, when one of pin of stretching 36 or 38 is bonded in re-spective engagement track 32,34,
Slidable cam bearer 22 is due to the spiral-shaped of engagement rail 32,34 and in the enterprising line position of the longitudinal direction of camshaft 12
It moves.At the end of axial displacement process, via release inclined-plane 32A, 34A by each driver on against the direction for stretching out direction
24, the pin 36 or 38 of 26 stretching is guided from re-spective engagement track 32,34, and is sold and thus bounced back.Each driver 24,
26 pin 36,38 is detached from from each engagement rail 32,34.
Driver 24,26 can electromagnetically, pneumatically and/or hydraulically be driven.Hereinafter, it is retouched referring to Fig. 2 and Fig. 3
The particularly preferred exemplary embodiment of the driver 24,26 with hydraulic-driven is stated.
Sliding cam system 14 can extraly have locking device (not shown).Locking device can be designed for by
Cam bearer 22 is axially fixed to the first axial position and second axial position.For example, for this purpose, locking device can have bullet
The pre-tensioned blocking body of property.At the first axial position of cam bearer 22, stop body that can be bonded on the first of cam bearer
In recess portion, and at the second axial position of cam bearer 22, body is stopped to be bonded in the second recess portion of cam bearer 22.Example
Such as, locking device can be set in camshaft 12.
Force transfering device 16 has force transmission element 40, bar axis 42 and multiple bar bearing housings 43 for mounting rod axis 42
(a bar bearing housing is only schematically shown in Fig. 1).Force transmission element 40 is rotatably disposed on bar axis 42.
In the shown embodiment, force transmission element 40 is designed to rocker arm (Kipphebel), and thus bar axis 42 is designed
At rocker arm shaft.However, for example, force transmission element 40 can also be designed to finger device (Schlepphebel).
Force transmission element 40 has cam-follower 44, and cam-follower 44 is, for example, the shape for the roller being rotatably mounted
Formula.Cam-follower 44 is followed according to the axial position of cam bearer 22 in the cam wheel of the first cam 28 and the second cam 30
It is wide.
At the first axial position of cam bearer 22, force transmission element 40 is effectively connected to via cam-follower 44
Between first cam 28 and ventilation door 18 and 20.Ventilation door 18 and 20 is driven according to the cam contour of the first cam 28.In Fig. 1
In show such case.At the second axial position of cam bearer 22, force transmission element 40 via cam-follower 44 and
It is effectively connected between the second cam 30 and ventilation door 18 and 20.Ventilation door is driven according to the cam contour of the second cam 30
18 and 20.
First driver 24 and the second driver 26 partly accommodate (integrated) in bar axis 42.This is especially from optimal peace
It is particularly advantageous from the perspective of dress space utilization, reason is that driver 24 and 26 does not need or need seldom independent
Installation space.In order to realize identical advantage, the first driver 24 and the second driver 26 can integrate the bar axis in bar axis 42
In bearing block.As other example, in the case where corresponding large-sized force transmission element 40, driver 24 and 26 can be with
It is directly integrated in force transmission element 40.
Fig. 2 shows the cross-sectional views of the first driver 24.Second driver 26 can be carried out as the first driver 24
Design.First driver 24 has pin 36, hydraulic lifting apparatus 46 and the first elastic element 48.
Hydraulic lifting apparatus 46 has the first cylinder 50, control piston 52, the second elastic element 54 and discharge-channel 56.
Control piston 52 is arranged in the control fluid chamber 58 of the first cylinder 50 in a manner of it can longitudinally move.Control is lived
Plug 52 is designed to integrate with pin 36.However, for example, pin can also effectively be connect with the control piston of lifting device.
Controlling fluid chamber 58 can be via control fluid channel 60 filled with control fluid.If it is desire to cam bearer 22 from
The first axial position is displaced (referring to Fig. 1) to second axial position, then controls fluid chamber 58 and be filled control fluid.Specifically,
It controls fluid and reaches control fluid chamber 58 via control fluid channel 60 from service duct 62.As for driving the first driver
A part of 24 control system (Ansteuerungsleitung), service duct 62 are at least partially accommodated into bar axis 42.Control
Pressure in fluid chamber 58 processed increases due to controlling the supply of fluid.As shown in Fig. 2, control piston 52 and pin 36 are in the first gas
It is moved on the direction towards camshaft 12 in cylinder 50, with engaging (engagement) in the first engagement rail 32.It is inverse to control piston 52
The second elastic element 54 pre-tensioning (restoring force) it is mobile.For example, the second elastic element 54 can be helical spring.It can
Via the discharge of discharge-channel 56 from fluid chamber 58 is controlled into the leak fluid in the doughnut of the second elastic element 54.
(referring to Fig. 1) at the end of the axial displacement of cam bearer 22, pin 36, which reaches, releases inclined-plane 32A.Release inclined-plane 32A
The pushpin 36 on the direction towards control fluid chamber 58.High pressure in control fluid chamber 58 prevents pin 36 and control piston
52 enter control fluid chamber 58.Pin 36 and control piston 52 do not retract in the first cylinder 50.Alternatively, lifting device 46 is made
It moves and (returns inside the second cylinder 64 of driver 24 against the pre-tensioning (restoring force) of the first elastic element 48 for entirety
Contracting).
For example, the first elastic element 48 can be helical spring.The space for accommodating the first elastic element 48 can be substantially
Do not control fluid.When lifting device 46 bounces back, fluidity is formed between control fluid channel 60 and passing away 66 and is connected
It is logical.The increased pressure decline being primarily present in control fluid chamber 58.Control the power that piston 52 passes through the second elastic element 54
It retracts in the first cylinder 50.Pin 36 is no longer contacted with the first engagement rail 32.The pre-tensioning of first elastic element 48 squeezes
Lifting device 46, to be returned to initial position.
It illustrates schematically how to be supplied according to the rotation angle of camshaft 12 to driver 24,26 in Fig. 3 and control
Fluid.For example, by the supply of control fluid, it can be ensured that cam 28,30 is only being cut between cam 28,30 in base circle region
Change (axial displacement for executing cam bearer 22).
Control fluid supply apparatus 68 is integrated in bearing block 70 and camshaft 12.Bearing block 70 has the first service duct
72 and second service duct 74.Camshaft 12 is mounted in bearing block 70 via integral type or multi-hull type bearing shell 76.Bearing shell 76 has
There is access, so that being formed with ring segment channel 78,80 between camshaft 12 and bearing block 70.In addition, camshaft 12 has cross
To channel (Querkanal) 82.Interconnection 82 extends in a manner of perpendicular to the longitudinal axis of camshaft 12, and for example can
Enough it is designed to through channel.
First service duct 72 is arranged in the upstream end of the second service duct 74.First service duct 72 is arranged in hyperbaric chamber
Downstream at.Second service duct 74 is arranged in the upstream end of service duct 62.Depending on the rotation position of camshaft 12, via
Ring segment channel 78, interconnection 82 and ring segment channel 80 are formed between the first service duct 72 and the second service duct 74
Fluid communication.In other words, interconnection 82 selectively makes service duct 72 and 74 according to the rotation angle of camshaft 12
It is interconnected.If the camshaft 12 in shown example is for example rotated in the counterclockwise direction about 90 ° (from 12 points to 9 point),
The fluid communication between supply tank 72 and 74 is kept during the rotation.On the contrary, then being revolved in the counterclockwise direction in camshaft
During turning 90 ° (from 9 points to 6 point), fluid communication is not present between service duct 72 and 74.Service duct 72 and 74 does not have
It is connected to by ring segment slot 78,80 and transverse groove 82.
How the construction of control fluid supply apparatus 68 shown in Fig. 3 only diagrammatically illustrates according to camshaft rotation angle
Carry out said supply of control fluid.Obviously, the angular regions in actual embodiment ring segment channel 78,80 particular according to shown in
And it is different.
The present invention is not limited to above-mentioned preferred embodiments.More precisely, various variants and modifications are possible, these changes
Type and modification have equally used design of the invention and have therefore fallen into protection scope.Particularly, the present invention be also claimed from
Belong to claimed subject matter and feature, and it is unrelated with the claim cited in them.
Reference signs list
10 variable valve actuator for air, 12 camshaft
14 sliding cam system, 16 force transfering device
The 18 first ventilation ventilation doors of doors 20 second
22 cam bearer, 24 first driver
26 second driver, 28 first cam
30 second cam, 32 first engagement rail
32A releases 34 second engagement rail of inclined-plane
34A releases inclined-plane 36 and sells (bolt)
38 pins (bolt) 40 force transmission element (rocker arm)
42 bar axis, 43 bar bearing housing
44 cam-follower, 46 lifting device
48 first elastic element, 50 first cylinder
52 control 54 second elastic elements of piston
56 discharge-channels 58 control fluid chamber
60 control 62 service ducts of fluid channel
64 second cylinder, 66 passing away
68 control 70 bearing blocks of fluid supply apparatus
72 first service duct, 74 second service duct
76 78 first annular sections of bearing shell channels
80 second ring segment channel, 82 interconnection
Claims (15)
1. a kind of variable valve actuator for air (10) for internal combustion engine comprising:
Camshaft (12)；
It takes a breath door (18,20)；
Cam bearer (22) can be arranged in non-rotatably and axially on the camshaft (12), and have first
Cam (28) and the second cam (30)；
Force transfering device (16), with force transmission element (40), the force transmission element is according to the cam bearer (22)
Axial position is selectively between first cam (28) and the ventilation door (18,20) or in second cam
(30) effectively connection is formed between the ventilation door (18,20), particularly, the force transmission element is finger-like follower or shakes
Arm；And
First driver (24), is used for the axial displacement of the cam bearer (22), wherein first driver (24) is extremely
It is partially contained in the force transfering device (16).
2. variable valve actuator for air (10) according to claim 1, wherein
The force transfering device (16) has bar axis (42), and particularly, the bar axis is rocker arm shaft or finger device axis, and
First driver (24) is at least partially accommodated into the bar axis (42).
3. variable valve actuator for air (10) according to claim 1 or 2, wherein
The force transfering device (16) has bar bearing housing (43), and
First driver (24) is at least partially accommodated into the bar bearing housing (43).
4. variable valve actuator for air (10) according to any one of claim 1 to 3, wherein
First driver (24) is at least partially accommodated into the force transmission element (40).
5. variable valve actuator for air (10) according to any one of the preceding claims, wherein
First driver (24) electromagnetically, pneumatically and/or is hydraulically driven, and
For driving the control system (62) of first driver (24) to be at least partially accommodated into the force transfering device (16)
In, particularly, it is at least partially accommodated into the force transmission element (40), the bar axis (42) and/or the bar bearing housing
(43) in.
6. variable valve actuator for air (10) according to any one of the preceding claims, wherein first driver (24)
Include:
Telescopic pin (36) can be engaged with the first engagement rail (32) to be used for the axial position of the camshaft (12)
It moves, longitudinal axis of first engagement rail around the camshaft (12) preferably extends spirally.
7. variable valve actuator for air (10) according to any one of the preceding claims, wherein first driver (24)
Including the promotion dress with the first cylinder (50) and the control piston (52) being movably disposed in first cylinder (50)
Set (46), it is preferable that the lifting device is hydraulic lifting apparatus, wherein the control piston (52) has with the pin (36)
The connection of effect ground is formed integrally as with the pin.
8. variable valve actuator for air (10) according to claim 7, wherein
The lifting device (46) is movably disposed in the second cylinder (64) of first driver (24).
9. variable valve actuator for air (10) according to claim 7 or 8, wherein
An end of first engagement rail (32) be disposed with release inclined-plane (32A), and when the pin (36) from
When opening the track, the inclined-plane that exits makes the lifting device (46) in second cylinder (64) backwards to the cam
It is mobile from first position to the second position on the direction of support (22).
10. variable valve actuator for air (10) according to claim 9, wherein the first elastic element (48) is towards described
The pre-tensioner lifting device (46) on the direction of one position, particularly, first elastic element is spring.
11. variable valve actuator for air (10) according to claim 9 or 10, wherein first driver (24) further include:
It controls fluid service duct (62), is fluidly connected to institute at the first position of the lifting device (46)
The control fluid chamber (58) of lifting device (46) is stated, and/or
It controls fluid passing away (66), is fluidly connected to institute in the second place of the lifting device (46)
State the control fluid chamber (58) of lifting device (46).
12. the variable valve actuator for air according to any one of claim 7 to 11 (10), wherein first driver
(24) further include:
Second elastic element (54), the pre-tensioner control piston (52) on the direction backwards to the cam bearer (22),
Particularly, second elastic element is spring.
13. variable valve actuator for air (10) according to any one of the preceding claims further includes for the cam branch
The second driver (26) of the axial displacement of seat (22), wherein
Second driver (26) is at least partially accommodated into the force transfering device (16), particularly at least partly holds
It is contained in the bar axis (42) of the force transfering device (16), the bar bearing housing (43) of the force transfering device (16) and/or described
In the force transmission element (40) of force transfering device (16), and/or
Second driver (26) is designed to be equal with first driver (24).
14. variable valve actuator for air (10) according to any one of the preceding claims further includes driving for described first
The control fluid supply apparatus (68) of dynamic device (24) and/or second driver (26), the control fluid supply apparatus packet
It includes:
Bearing block (70) is used to be rotatably mounted the camshaft (12), and has the first control fluid service duct
(72) and be arranged in it is described first control fluid service duct (72) downstream at second control fluid service duct (74),
Wherein, first control fluid service duct (72) and second control fluid service duct (74) can be according to institutes
The rotation angle for stating camshaft (12) is formed selectively fluid communication, and the fluid communication particularly passes through the cam
Realize that the preferably described channel is interconnection in the channel of axis (12).
15. one kind has the motor vehicles of variable valve actuator for air according to any one of the preceding claims (10), especially
Ground, the motor vehicles are commerial vehicles.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017114575.3A DE102017114575A1 (en) | 2017-06-29 | 2017-06-29 | Variable valve train |
| DE102017114575.3 | 2017-06-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109209541A true CN109209541A (en) | 2019-01-15 |
| CN109209541B CN109209541B (en) | 2022-01-04 |
Family
ID=62562967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810667602.0A Active CN109209541B (en) | 2017-06-29 | 2018-06-26 | Variable valve mechanism |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US10890087B2 (en) |
| EP (1) | EP3421741B1 (en) |
| JP (1) | JP7195784B2 (en) |
| CN (1) | CN109209541B (en) |
| DE (1) | DE102017114575A1 (en) |
| RU (1) | RU2756493C2 (en) |
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| CN112664291A (en) * | 2019-10-16 | 2021-04-16 | 沃尔沃汽车公司 | Device for transmitting force from a camshaft to an output |
| CN113062783A (en) * | 2021-03-31 | 2021-07-02 | 东风商用车有限公司 | Variable valve lift mechanism |
| CN114096743A (en) * | 2019-07-23 | 2022-02-25 | 曼卡车和巴士欧洲股份公司 | Variable valve mechanism for engine braking mode |
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| DE102018110714A1 (en) * | 2018-05-04 | 2019-11-07 | Man Truck & Bus Se | Variable valve train |
| DE102019203432A1 (en) * | 2019-03-13 | 2020-09-17 | Mahle International Gmbh | Valve train of an internal combustion engine |
| DE102022117337A1 (en) | 2022-07-12 | 2024-01-18 | Bayerische Motoren Werke Aktiengesellschaft | Switching camshaft device for an internal combustion engine, internal combustion engine with a switching camshaft device and motor vehicle with an internal combustion engine |
| CN116163818B (en) * | 2023-04-24 | 2023-06-27 | 泰州市姜堰伟达机械有限公司 | Rocker arm device of internal combustion engine |
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Also Published As
| Publication number | Publication date |
|---|---|
| RU2018123619A (en) | 2019-12-31 |
| CN109209541B (en) | 2022-01-04 |
| JP7195784B2 (en) | 2022-12-26 |
| BR102018013164A8 (en) | 2022-12-20 |
| EP3421741A1 (en) | 2019-01-02 |
| EP3421741B1 (en) | 2020-01-08 |
| DE102017114575A1 (en) | 2019-01-03 |
| JP2019011757A (en) | 2019-01-24 |
| US20190003353A1 (en) | 2019-01-03 |
| US10890087B2 (en) | 2021-01-12 |
| RU2756493C2 (en) | 2021-09-30 |
| BR102018013164A2 (en) | 2019-04-16 |
| RU2018123619A3 (en) | 2021-08-26 |
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